Geometry Calculators


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Plane Geometry Calculators

Angle Conversion

Calculator for Constructing Regular Polygons
Draw a circle, measure the radius and this calculates the length of the polygon's sides.

Central Angle Calculator Calculates Central Angle of a Circle, Radius or Arc Length

Circle Circumference & Area

CIRCLE Sector, Segment, Chord, & Arc

Circle Equation Tutorial
Explains equations of the type x² + y² = r²

Circle Equation Calculator
Input 3 points and it calculates a circle's center radius and equation.


Types of Triangles A chart showing triangles classified by angles (acute, right, obtuse) and by sides (equilateral, isosceles, scalene).
Also has triangle area formulas and a triangle area calculator.

Triangle Centers A tutorial discussing the incenter, circumcenter, centroid, orthocenter and the Euler line.

Triangle Tester Calculates if 3 sides will form a triangle or not.

Right Triangles (Pythagorean Theorem)

30 60 90 and 45 45 90 Triangle Calculator

Regular Polygons

Quadrilateral page Descriptions and graphics discussing 6 different types of quadrilaterals.

Trapezoid Calculator
        How to Calculate Trapezoid Area

Calculator for Parallelograms Squares Rectangles Rhombuses

Quadrilateral Kite Calculator

Solid Geometry Calculators

Area and Volume Calculator for a Sphere or Cylinder

Spherical Tank

Spherical Cap

Cube Area and Volume

Rectangular Solid Area and Volume

Rectangular Tank   with Dipstick Calculator

Horizontal Cylindrical Tank   with Dipstick Calculator

Vertical Cylindrical Tank   with Dipstick Calculator

Torus Calculator - Calculates Volume and Area

The 5 Platonic Solids (Regular Polyhedra) Calculator - Information about the Tetrahedron, Hexahedron (Cube), Octahedron, Dodecahedron, Icosahedron and calculator.

Cones & Frustums

Right Regular Prisms

Right Regular Pyramids

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